Abstract: The inorganic powder of calcium carbonate and polypropylene (PP) were mixed to a scale before using the 1600mm width of spunbond non-woven machines to obtain PP spunbond nonwoven fabric. The article has studied the relation between Inorganic powder calcium carbonate ratio and Fiber structure and the mechanical properties of this PP spunbond nonwoven. The results show that: When the inorganic powder calcium carbonate ratio is smaller and the square weight of PP spunbond non-woven fabric is higher, there is an increasing trend in breaking strength. When the square weight is smaller, the breaking strength presented a downward trend with the calcium carbonate content increasing. In small deformation, the addition of calcium carbonate make a slight improvement in initial modulus of the modified PP spunbond non-woven fabric .and average diameter of PP fibers present a upward trend. With the content increasing of inorganic calcium carbonate powder, the pliability of PP spunbond non-woven fabric is decreasing gradually.